Michael Frost's "Exiles" portrays the world as a post-Christian culture that has departed from the methods of the traditional church. Frost investigates various ways that a Christian can live missionally within this world. The author pays particular attention to Christians who have drifted from the traditional church, yet have not adopted to the post-christian culture: "exiles." A new perspective must therfore be formed that integrates Christian beliefs with modern culture.

In a passionate discussion, the author delivers a request for a fresh, dynamic, and robust Christian faith that can be successfully applied to the post-Christian, 21st century Western world. The result of this discussion is the proposal of a Christian lifestyle that can be lived in non-religious categories and be considered desirable by not-yet Christians. 'Exiles' aims to design a living template for Christians to live dynamically within a society that no longer values the culture of the church, but does greatly value many of the things the Bible speaks positively about.

"Exiles" has been written in a reader-friendly style that is aimed at church leaders, pastors and laypersons. The book also features photographs and diagrams to help illuminate the author's thoughts and perspectives.